One of the consequences of our planet's being warming up is a（n）_______ in the number of natural disasters. 

I’m afraid I haven’t got a very good ________ of direction. I always get lost in the city.

 You should take the medicine after you read the ____.

These natural disasters have warned us that everyone should start to protect the_________ immediately.

I can’t say which type of tea tastes better. It’s just a（an） ______ of personal preference.